Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 93, NWS Tulsa, OK

April 20, 2011Sebastian County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 20, 2011, 2:09 PM CDT for Sebastian County, Arkansas. It was in force for 28 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2011, 2:09 PM CDT (19:09 UTC)
Expired: Apr 20, 2011, 2:37 PM CDT
In force: 28 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

County Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 23 km from the middle of the area, began a volume at 19:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 2:15 PM CDT	HAIL 1	3 S Greenwood, AR

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 6 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.2 hours before the alert went out and 196 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -175 m²/s²
0-3 km storm-relative helicity: -46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

258 
WUUS54 KTSA 201909
SVRTSA
ARC131-201945-
/O.NEW.KTSA.SV.W.0093.110420T1909Z-110420T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
209 PM CDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL SEBASTIAN COUNTY IN WEST CENTRAL ARKANSAS

* UNTIL 245 PM CDT

* AT 207 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 3 MILES SOUTH OF
  EXCELSIOR...MOVING EAST AT 25 MPH.

  STORM HAZARDS INCLUDE...
  QUARTER SIZE HAIL...
  WIND GUSTS TO 60 MPH...

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  EXCELSIOR...GREENWOOD...BURNVILLE...WASHBURN...BLOOMER AND FORT
  CHAFFEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3514 9413 3511 9414 3508 9419 3510 9439
      3517 9441 3533 9408 3522 9408 3522 9406
      3514 9405
TIME...MOT...LOC 1909Z 252DEG 23KT 3515 9431

$$

3 follow-up statements

732 
WWUS54 KTSA 201919
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
219 PM CDT WED APR 20 2011

ARC131-201945-
/O.CON.KTSA.SV.W.0093.000000T0000Z-110420T1945Z/
SEBASTIAN AR-
219 PM CDT WED APR 20 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR
EASTERN SEBASTIAN COUNTY...

AT 215 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
WITCHERVILLE...MOVING EAST AT 35 MPH.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
BURNVILLE...MILLTOWN...WASHBURN AND URSULA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3514 9413 3513 9413 3512 9427 3519 9430
      3533 9408 3522 9408 3522 9406 3514 9405
TIME...MOT...LOC 1919Z 253DEG 28KT 3517 9421

$$

589 
WWUS54 KTSA 201933
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
233 PM CDT WED APR 20 2011

ARC131-201945-
/O.CON.KTSA.SV.W.0093.000000T0000Z-110420T1945Z/
SEBASTIAN AR-
233 PM CDT WED APR 20 2011

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR
EASTERN SEBASTIAN COUNTY...

AT 228 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR 
WASHBURN...MOVING EAST AT 35 MPH. QUARTER SIZE HAIL WAS REPORTED 
SOUTH OF GREENWOOD AT 215 PM.

STORM HAZARDS INCLUDE...
QUARTER SIZE HAIL...
WIND GUSTS TO 60 MPH...

THE WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED
COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PEOPLE OUTSIDE SHOULD MOVE TO A SAFE SHELTER...PREFERABLY INSIDE A
STRONG BUILDING. STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3514 9405 3514 9417 3522 9418 3526 9408
      3522 9408 3522 9406
TIME...MOT...LOC 1933Z 254DEG 29KT 3520 9407

$$

185 
WWUS54 KTSA 201937
SVSTSA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
237 PM CDT WED APR 20 2011

ARC131-201947-
/O.CAN.KTSA.SV.W.0093.000000T0000Z-110420T1945Z/
SEBASTIAN AR-
237 PM CDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SEBASTIAN COUNTY IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING IS EXITING SEBASTIAN COUNTY AND 
HAS ALSO WEAKENED TO BELOW SEVERE LIMITS. THEREFORE...THE WARNING 
HAS BEEN CANCELLED.

LAT...LON 3514 9405 3514 9417 3522 9418 3526 9408
      3522 9408 3522 9406
TIME...MOT...LOC 1937Z 253DEG 28KT 3521 9405

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 1:20 PM CDT, 49 minutes earlier.

Area forecast discussion, Apr 20, 1:20 PM CDT, 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
120 PM CDT WED APR 20 2011

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
A STALLED FRONTAL BOUNDARY ACROSS TEXAS WILL PROMOTE
THUNDERSTORM DEVELOPMENT OVER SOUTHEAST OKLAHOMA LATE
THIS AFTERNOON AND ESPECIALLY OVERNIGHT TONIGHT. CLOUDS
OVER SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS WILL BE
LOWERING DURING THE OVERNIGHT HOURS...WITH MVFR CEILINGS
EXPECTED AT MOST LOCATIONS BY 12Z THURSDAY. THUNDERSTORMS
ARE ALSO EXPECTED OVERNIGHT AND THURSDAY MORNING.

&&

.PREV DISCUSSION... /ISSUED 1103 AM CDT WED APR 20 2011/

DISCUSSION...
FOR THE AFTERNOON...LOWERED MAX TEMPS A FEW DEGREES
DUE TO COOL NORTH SURFACE WINDS AND VARIABLE CLOUD.
FRONTAL BOUNDARY FROM TX > TN WELL SOUTH OF THE RED
RIVER. JUST SCATTERED SHRA/TSRA FAR SOUTHEAST OK.
GW

PREV DISCUSSION... /ISSUED 634 AM CDT WED APR 20 2011/

DISCUSSION...

THE 12Z AVIATION DISCUSSION IS INCLUDED BELOW.

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
A LARGE AREA OF MVFR CIGS HAS SAGGED SOUTH OVERNIGHT ACROSS NE OK
AND NW AR. NAM MODEL HAS THESE CIGS SCATTERING OUT BY 15 OR
16Z...BUT THEY COULD HANG ON LONGER WITH THE HIGHER OVERCAST
SPREADING OVER. MAINLY VFR CONDITIONS EXPTD AT THE OTHER TAF SITES
THIS MORNING...OUTSIDE OF A BRIEF CHANCE OF MVFR CIGS AT KMLC. VFR
CONDITIONS SHOULD PREVAIL AREA WIDE THIS AFTERNOON. TSRA CHANCES
WILL INCREASE FM S TO N ACROSS THE AREA MAINLY AFT 00Z THU.

LACY

PREV DISCUSSION... /ISSUED 405 AM CDT WED APR 20 2011/

DISCUSSION...
AN ACTIVE WEATHER PATTERN IS SHAPING UP ACROSS THE PLAINS WITH
A SERIES OF SHORT WAVES AND FRONTAL BOUNDARIES MOVING THOUGH DURING
THE FORECAST PERIOD. THE MAIN FOCUS WITHIN THE SHORT TERM WILL BE
THE COLD FRONT WHICH PASSED THROUGH THE CWA YESTERDAY EVENING.

THIS FRONTAL BOUNDARY IS EXPECTED TO STALL OUT JUST SOUTH OF THE
RED RIVER ACROSS NORTHERN TEXAS TODAY. BEHIND THE
FRONT...NORTHERLY WINDS AND COOLER TEMPS WILL BE COMMON FOR THE
CWA. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS WILL ALSO BE
POSSIBLE IN THE VICINITY OF THE FRONT ACROSS SOUTHEAST OKLAHOMA
AND INTO WEST CENTRAL ARKANSAS.

THURSDAY LOOKS FOR CONDITIONS TO BEGIN TO CHANGE WITH THE FRONTAL
BOUNDARY RETREATING BACK NORTHWARD. LATEST MODEL RUNS HAVE A
DISAGREEMENT ON JUST HOW FAR NORTH THE BOUNDARY WILL GO. WILL STAY
WITH CURRENT THINKING OF THE FRONT REACHING CLOSE TO SOUTHERN
KANSAS BY THURSDAY EVENING. SHOWERS AND THUNDERSTORMS WILL REMAIN
POSSIBLE AS THIS BOUNDARY PUSHES THROUGH. HIGH TEMPS SHOULD COME LATE
IN THE DAY AND THEN EITHER NOT CHANGE MUCH OVERNIGHT OR SLOWLY
RISE AS THE FRONT CONTINUES NORTHWARD. NEEDLESS TO SAY THIS WILL
MAKE FOR A TOUGH TEMPERATURE FORECAST.

MODELS INDICATE A SERIES OF SHORTWAVE TROFS PUSHING INTO THE
PLAINS DURING THE EXTENDED FORECAST PERIOD. THE FIRST IS DURING
THE FRIDAY TIME PERIOD. THIS WAVE WILL TRY TO PUSH A WEAK COLD
FRONT INTO THE CWA...THOUGH QUICKLY RETREATING NORTHWARD BY
SATURDAY. THE NEXT SET OF SHORTWAVES ARE PROGGED DURING THE
BEGINNING OF THE NEXT WORK WEEK AND THEN BY THE MIDDLE PART OF THE
WEEK. MODELS CONTINUE TO BE OUT OF PHASE ON TIMING... AND DIVERGE
ON THE STRENGTH AND LOCATION OF THESE SYSTEMS. THE ONE THING THAT
THEY HAVE IN COMMON IS THAT CHANCES FOR SHOWERS AND THUNDERSTORMS
SHOULD CONTINUE FOR MOST OF THE WEEK. WILL CONTINUE WITH CHANCE
POPS FOR THE CWA THROUGH WEDNESDAY. TEMPS DURING THE EXTENDED
FORECAST PERIOD LOOK TO BE PROBLEMATIC WITH THE DIFFERENCES
BETWEEN THE MODEL DATA. WENT WITH AN ATTEMPTED MODEL BLEND ALONG
WITH THE PREVIOUS FORECAST PACKAGE. THESE TEMPS ALONG WITH POPS
WILL CONTINUE TO BE REFINED AS THE EVENT GETS CLOSER AND DATA
ALONG WITH FORECASTER CONFIDENCE BECOMES MORE IN LINE WITH EACH
OTHER.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   65  51  67  64 /  10  40  60  40
FSM   68  53  69  61 /  20  60  60  30
MLC   66  56  72  68 /  20  60  40  20
BVO   62  49  65  60 /  10  30  70  50
FYV   64  49  66  60 /  10  50  70  40
BYV   61  46  62  58 /  10  40  70  50
MKO   66  52  67  62 /  10  50  60  30
MIO   62  48  65  62 /  10  30  70  60
F10   64  53  70  65 /  10  50  50  30
HHW   69  58  78  67 /  20  60  40  20

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

SHORT TERM...21
LONG TERM....12
AVIATION...21

Hazardous weather outlook, Apr 20, 1:08 PM CDT, 1 hour 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
108 PM CDT WED APR 20 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
107 PM CDT WED APR 20 2011

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...TONIGHT.

DISCUSSION...
A STALLED FRONTAL BOUNDARY WILL STAY WELL SOUTH OF THE RED RIVER
THIS AFTERNOON AND TONIGHT. THUNDERSTORMS MAY DEVELOP THIS AFTERNOON
OVER SOUTHEAST OKLAHOMA...BUT WILL LIKELY REMAIN BELOW SEVERE LIMITS.
MORE NUMEROUS ELEVATED THUNDERSTORMS ARE EXPECTED OVERNIGHT TONIGHT
IN SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. THE PRIMARY THREAT FROM
THOSE STORMS WILL BE LARGE HAIL.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION IS UNLIKELY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THURSDAY...SEVERE THUNDERSTORM POTENTIAL.
FRIDAY...SEVERE THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
SATURDAY...THUNDERSTORM POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL.
MONDAY...THUNDERSTORM POTENTIAL...HIGH WIND POTENTIAL.
TUESDAY...THUNDERSTORM POTENTIAL.

EXTENDED DISCUSSION...
SEVERE THUNDERSTORM POTENTIAL WILL INCREASE THURSDAY AND
THURSDAY NIGHT AS THE FRONTAL BOUNDARY OVER TEXAS SLOWLY
LIFTS NORTH INTO OKLAHOMA AND ARKANSAS.

A SHORTWAVE TROUGH IS EXPECTED TO MOVE THROUGH THE CENTRAL PLAINS
ON FRIDAY. IN RESPONSE TO THIS SYSTEM...A COLD FRONT WILL SURGE
SOUTHEAST INTO OK...AND INTERSECT A DRYLINE OVER THE CENTRAL PART
OF THE STATE. STORMS ARE EXPECTED TO DEVELOP ALONG THE FRONT AND
DRYLINE...SOME OF WHICH COULD BECOME SEVERE WITH LARGE HAIL AND
ISOLATED TORNADOES POSSIBLE.

THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE WEEKEND AS THE
FRONTAL BOUNDARY STALLS OVER THE REGION.

ANOTHER STRONG UPPER LEVEL STORM IS EXPECTED TO REACH INTO THE
PLAINS ON MONDAY...WITH WIDESPREAD ORGANIZED SEVERE STORMS
POSSIBLE ALONG THE DRYLINE AND COLD FRONT BY MONDAY
AFTERNOON...CONTINUING INTO THE NIGHTTIME HOURS. SMALL CHANCES FOR
STORMS WILL LINGER OVER SOUTHEAST OK AND WEST CENTRAL AR INTO
TUESDAY MORNING BEFORE ENDING.

EMERGENCY MANAGEMENT PLANNING STATEMENT...

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Local storm report, Apr 20, 9:20 AM CDT, 4 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
920 AM CDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0511 PM     HAIL             3 NE OAK GROVE          36.22N 94.15W
04/19/2011  E1.00 INCH       BENTON             AR   PUBLIC

            IN THE TOWN OF BLUE EYE

0611 PM     HAIL             GOSHEN                  36.10N 93.99W
04/19/2011  E1.00 INCH       WASHINGTON         AR   PUBLIC

&&

RBD

Local storm report, Apr 20, 9:43 AM CDT, 4 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
943 AM CDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0653 PM     HAIL             1 E GREEN FOREST        36.34N 93.42W
04/19/2011  E1.00 INCH       CARROLL            AR   LAW ENFORCEMENT

            MOSTLY DIME TO NICKEL

&&

RBD

Special weather statement, Apr 20, 1:37 PM CDT, 32 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
137 PM CDT WED APR 20 2011

ARZ029-OKZ076-201900-
LE FLORE OK-SEBASTIAN AR-
137 PM CDT WED APR 20 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 200 PM CDT
FOR THE FOLLOWING COUNTIES...

IN WEST CENTRAL ARKANSAS
     SOUTHWESTERN SEBASTIAN

IN SOUTHEAST OKLAHOMA
     EASTERN LE FLORE

AT 137 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 2 MILES WEST OF
HEAVENER...MOVING NORTHEAST AT 40 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...HODGEN...HEAVENER...HOWE...PATTERSON
AND HARTFORD.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL. THIS STORM
WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.

LAT...LON 3482 9464 3490 9473 3507 9440 3496 9434
TIME...MOT...LOC 1837Z 237DEG 35KT 3491 9461

Special weather statement, Apr 20, 1:59 PM CDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
159 PM CDT WED APR 20 2011

ARZ029-201930-
SEBASTIAN AR-
159 PM CDT WED APR 20 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 230 PM CDT
FOR THE FOLLOWING COUNTY...

IN WEST CENTRAL ARKANSAS
     CENTRAL SEBASTIAN

AT 200 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES NORTHWEST
OF MIDLAND...MOVING EAST AT 35 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...CROSSROADS...MILLTOWN...URSULA...
HACKETT...GREENWOOD...ARKOLA...HUNTINGTON...MIDLAND...DAYTON...
WITCHERVILLE...WASHBURN...BURNVILLE...EXCELSIOR...FORT CHAFFEE...
JENNY LIND AND BLOOMER.

THIS STORM WILL BE CAPABLE OF PRODUCING NICKEL SIZE HAIL AND WIND
GUSTS TO 50 MPH.

LAT...LON 3514 9403 3514 9413 3510 9415 3506 9424
      3507 9444 3523 9443 3536 9408 3522 9408
      3521 9405 3522 9402 3515 9402
TIME...MOT...LOC 1900Z 252DEG 29KT 3514 9436

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 1:59 PM CDT	Special Weather Statement	TSA	Sebastian	31 min
Apr 20, 2:27 PM CDT	Special Weather Statement	TSA	Logan	33 min
Apr 20, 2:52 PM CDT	Special Weather Statement	TSA	Sebastian	23 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.